our first witness is mark kelly. he's -- our first witness is mark can kelly, retired astronaut and co-founded americans for potential solutions. thsz an advocacy that promotes to prevent gun violence and protect responsible gun ownership, with his wife, former congresswoman gabrielle giffords. please go ahead, sir. >> thank you chairman leahy and ranking member grassry for inviting me today. i look forward to an instructive dialogue with your committeeant want to take the opportunity to congratulate gabby's friend jeff lake on new role as arizona's junior senator. as you know, our family has been immeasurableably affected by gun violence. gabby's gift for speech is a distant gg? news breaks to yet another tragic shooting. after 20 kids and six of their teachers were gunned down in their classrooms at sandy hook elementary, we said this time must be different. something needs to be done. we're simply two reasonable americans who have said enough. on january 8th of 2011, a young man walked up to gabby at her constitue